Specialized metallurgical processes – compositions for use therei – Processes – Electrothermic processes
Patent
1979-07-13
1982-02-09
Andrews, M. J.
Specialized metallurgical processes, compositions for use therei
Processes
Electrothermic processes
75 68A, C22D 702
Patent
active
043148468
ABSTRACT:
A method for production of aluminum and aluminum alloys by carbothermic reduction of alumina alone or in its mixtures with other oxides, comprising the steps of supplying the reducing agent carbon, and the oxide which shall be reduced, along separate paths so that the carbon is supplied by ascending motion, bringing the carbon and the oxide to meet in a zone to which electrical energy is supplied by electrodes, thereby maintaining a high temperature in this zone and effecting the reaction between carbon and oxide, forcing the reaction gas downwards through the ascending carbon charge, thereby cooling the gas and effecting the condensation of metal vapors, liquid metal running down through the carbon charge and being collected in a receptacle located underneath the carbon charge.
An arrangement for execution of the said method, comprising a vertical shaft inside which the carbon charge contained in carbon containers moves upwards and meets the oxide charged from above, electrical energy being supplied by electrodes extending through the oxide charge, and underneath the shaft an elongated chamber furnished with two sets of vertical columns and hoisting machinery for supporting and moving the carbon containers through the shaft, the two sets mounted on a common carriage which can be displaced horizontally so that the two columns alternate in the working position directly underneath the shaft.
REFERENCES:
patent: 2978315 (1961-04-01), Schenck et al.
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